Method of producing sectional boiler drums



oci. 3o, 1928.

G. LASKER METHOD 40F PRODUCING sECTIoNAL BOILER DRUMS Oct. 30, 1928.1,689,789

G. LAsKER METHOD OF PRODUCING SECTIONAL BOILER DRUMS Filed Sept. 19,1925 2 Sheets-Sheet 2 lll/111% 4 @Mgg/@ 3' um Pe-.isses oa. 3o, 1928.

GEORGE riasnnaor encienso. ILLINOIS.

METHOD or ,PRODUCI'NG Smfroirnnnorrnn nanars. 1 u

Application filed September 179, 1925. Serial No. 57,448.

My invention relates to sectional drums and a method of )rodu'cing thesame, and particularly to a sectional drum construction adapted for usein boilers, stills; furnaces; tanks or the like7 and a method ofproducing such sectional drums.

It is an object of the invention to .provide sectional drums which willbe relatively light in weight and have great strength.

Another object of the invention is to provide improved sectional .drumsin which there will be no longitudinal joints or seams.

Many other` object-s and advantages of the construction herein shown anddescribed will be obvious to those skilled in the art from thedisclosure herein given. f

To this end my invention consists in the novel construction,arrange-ment and combination of parts herein shown and described;

and more particularly pointed out in the claim.

In the drawings, wherein like reference*v characters indicate llike orcorresponding parts: Fig. l is a. longitudinal sectional view .of V adrum used for a water tube boiler; l

Fig. 2 is a section taken substantially on line 2-2 of Fig. 1;

Fig. 3 is a sectional detail showing the manner of fastening adjacentsections and of y securing the tubes to the drum;

Fig. l represents a perspective view of a billet from which a-boiler'section is to be formed in accordance with my invention;

Fig. 5 is fa perspective view of such a billet after having beenpierced;

Fig. 6 represents a sectional view of such a pierced billet at asubsequent stage `of the process;

Fig. 7 is a. sectional view taken on the line 7-7 of Fig. 6;

Fig. 8 is a sectional view similar to Fig. 6 at a still. later stage ofthe process; and

Fig. 9 is a sectional view taken on the line. 4a 9-9 of Fig. 8. v j

Referring to the drawings, wherein I have illustrated severalpreferredembodiments of my invention; there is'v shown in Figs. l, 2 and3, a drun'i comprisingk ends 1 and a plu- 5o rality of seamless annularsections 2 held therebetween. In the `particular form shown; the drum isto be used in connection with the tubes 3 extending radially of the drumaxis, as part of a water tube boiler. 5o Each of the sections 2 ispreferably made from a billet or ingot that has been cast at `thefurnace: in the usual or any preferred manner; and .then rolled into theshape shown.. These ingots may 'be cast in the form of hollow'cylindersand then. rolled and expanded to the diameter,V shape and thclrnessdesired, or theingots may be cast as shown in Fig. et and then pierced,as shown in Fig. 5; whereafter the rolling may be done to produce asection of the shape required. in this manner there is produced a.seamless section or annulus, as seen Vin. .Figsl 6 and 7; which, whileof thin section,

yet iscapable of withstanding higher pressure for its thickness than ifthe section wereV welded or had a longitudinal joint therein. Flangesy 4may be forinedat one or both sides of the sections 2 during the rollingthereof, these `flanges not only providing means for attaching adjacentsections together by Ymeans of rivets or the like 5, but

alsoreinforcingthe drum, and these flanges are especially desirablewhere the drum has been weakened by the necessity of removingsu'l'licient material therefrom for the inser-v tion of the tubes Itwill be noted that therivets are vnot exposed to the fire as in theusual construction. After the rolling operation, rivet holes 6 areprovided in the flanges, and openings 7 are provided to receivethetubes'3 (see Figs. 8 and 9).

It will be noted that the rivets and flanges are on thewater sideof thedrum; or inl other words; that the fire does not come directly ontosaidr flangesV or rivets, thus insuring a longer serviceability of theparts. Any of the sections may be renewed atwill; and when reeassembledtheboiler will be as good as before. Furthermore; the possibility'offailure is reduced, not only because of ythe higher grade of materialused, but because only local parts are affected by fire or the like,instead of the whole boiler.

It willalso be noted the drum is composed of adjoining seamlesscylinders having a reinforcing ring at the sides in the'form of a Hange;thus permitting the use of comarativel light Oauge material for hiUh tob o Y D pressures.

K Having thus described my invention, it is obvious that variousimmaterial modifications inay be made in the same without departing fromthespirit of my invention; hence l do not wish to be understood asllimiting myself to the exact form; construction, arrangement and.combinationof partsA herein shown and rdescribed or uses mentioned. Y Y

What I claim as new and desire to secure by Letters Patent is:

The method -of making a boiler drum section, lcomprising piercing aningot andv to form tube receiving openings and forming aiiange laterallyof said Wall. Y

In testimony' whereof, I have hereunto signed my name.

GEQRGELASVKER.

